private void receiptbtn_Click(object sender, EventArgs e)
{
SaveFileDialog dialog = new SaveFileDialog();
dialog.Filter = "PDF Document File | *.pdf";
dialog.DefaultExt = ".pdf";
if (dialog.ShowDialog() == DialogResult.OK)
{
FileStream fs = new FileStream(dialog.FileName, FileMode.Create);
fee.GeneratePDF(fs);
MessageBox.Show("PDF Generated", "Fee Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}